﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.ServiceModel.DomainServices.Client.ApplicationServices;
using System.Windows.Navigation;
using ShopOnline.Views;

namespace ShopOnline
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();

            WebContext.Current.Authentication.LoggedIn += Authentication_LoggedIn;
            WebContext.Current.Authentication.LoggedOut += Authentication_LoggedOut;
            this.textBlockLoggedUser.Text = "[anonimous user]";
        }

        private void Authentication_LoggedIn(object sender, AuthenticationEventArgs e)
        {
            this.hyperlinkButtonLoginLogout.Content = "Logout";
            this.textBlockLoggedUser.Text = "[Welcome, " + WebContext.Current.User.Name + "]";
            ShowOrdersPage();
        }

        private void ShowOrdersPage()
        {
            if (WebContext.Current.User.IsAuthenticated)
            {
                this.MainFrame.Source = new Uri("/Views/ViewOrders.xaml", UriKind.Relative);
            }
            else
            {
                ShowLoginPage();
            }
        }

        private void ShowLoginPage()
        {
            this.MainFrame.Source = new Uri("/Views/LoginPage.xaml", UriKind.Relative);
        }

        private void Authentication_LoggedOut(object sender, AuthenticationEventArgs e)
        {
            this.textBlockLoggedUser.Text = "[anonimous user]";
            this.hyperlinkButtonLoginLogout.Content = "Login";
            ShowLoginPage();
        }

        // After the Frame navigates, ensure the HyperlinkButton representing the current page is selected
        private void ContentFrame_Navigated(object sender, NavigationEventArgs e)
        {
            foreach (UIElement child in MenuList.Children)
            {
                HyperlinkButton hb = child as HyperlinkButton;
                if (hb != null && hb.NavigateUri != null)
                {
                    if (hb.NavigateUri.ToString().Equals(e.Uri.ToString()))
                    {
                        VisualStateManager.GoToState(hb, "ActiveLink", true);
                    }
                    else
                    {
                        VisualStateManager.GoToState(hb, "InactiveLink", true);
                    }
                }
            }
        }

        // If an error occurs during navigation, show an error window
        private void ContentFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            e.Handled = true;
            ChildWindow errorWin = new ErrorWindow(e.Uri);
            errorWin.Show();
        }

        private void HyperlinkButton_Click(object sender, RoutedEventArgs e)
        {
            if (WebContext.Current.User.IsAuthenticated)
            {
                HyperlinkButton hB = (HyperlinkButton)sender;
                Uri uri = new Uri(@"/Views/ViewOrders.xaml", UriKind.Relative);
                hB.NavigateUri = uri;
            }
            else
            {
                HyperlinkButton hB = (HyperlinkButton)sender;
                Uri uri = new Uri(@"/Views/LoginPage.xaml", UriKind.Relative);
                hB.NavigateUri = uri;
            }
        }

        private void hyperlinkButtonLoginLogout_Click(object sender, RoutedEventArgs e)
        {
            if (WebContext.Current.User.IsAuthenticated)
            {
                WebContext.Current.Authentication.Logout(true);
            }
            else
            {
                ShowLoginPage();
            }
        }
    }
}
